Steam-boiler.



D. S. JACOBUS.

STEAM BOILER. n APPLicATloN FILED APR. l0. |916.

1,250,181. Patented Dee.18,1917.

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Patented De.18,1917.

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STEAM Bonn. APPLICATION FILED APR. l0. |916 nNiTED srxrns PATENT ernten DAVID S. JACOBUS, OF JERSEY CITY, NEW JERSEY, ASSIGNOR TO `'I HE BAIBCOCK &

WILCOX COMPANY, 0F BAYONNE; NEW JERSEY, A CORPORATION OF NEW JERSEY.

STEAM-BOILER.

Specification of Letters Patent.

Patented nee. is, 1era.

Application iled April 10, 1916. Serial No. 90,060.

more particularly to a new superheater arrangement, and will be understood by reference to the accompanying drawings in which Figure 1 is a longitudinal section through a boiler showing the superheater near the front of the front bank of tubes, the view being more orless diagrammatic, and the furnace omitted; Fig. 2 'a detail of the means for supporting a tile b'aflie between a portion of the superheater and the furnace; Fig. 3 a sectional view and Fig. 4 a side view, illustrating a form of baffle which may be used in place of that of Fig. 2; Fig. 5 a longitudinal section through a boiler showing a modification in which two superheaters are employed; and Fig. 6 a detail of the means for supporting the tile at the rear of the line of tubes which comes nearest the furnace Similar reference numerals indicate similar parts in the several views.

Referring to Fig. 1, the boiler shown is of the general Stirling type comprising transverse steam and water drums 1, 2 and 3, and a lower mud drum 4,'the upper and lower drums being connected by three banks of tubes 5, 6 and 7 The middle steam and water drum is connected with the front drum 1 by steam and water circulators, and to the rear steam and water drum by steam circulators, as shown. A baiie 8 is supported upon one of the rows of tubes of the irst bank, near the front thereof, and extends upward from a point at the rear of the bridge wall 9, so that the gases will be directed, substantially as indicated b the arrows, across the top of the front bank into the secondary combustion chamber at/` the rear of said bank.- A baiiie 10 is shown as supported upon the front row of tubes of the middle bank and extending down- -ward from the middle steam and water drum. A baffle 11 is supported upon the rear row of tubes of the middle bank and extends upward from the mud drum 4. lnthe particular system of baffling shown, the third or rear bank of tubes is provided with a baflie 12 extending downward from the rear steam and water drum. The gases, after crossing the top portion of the front bank of tubes flow into the secondary combustion chamber, at the rear .of said bank,

and thence in a downward direction over the tubes of the front bank at the rear of the ba'lie 8 and the front row of the second bank, thence upward-along the tubes o f the middle bank, downward over the tubes of the rear bank to the outlet 13. A crossbaHe or shelf 1l extends from the baffle 11 so as to direct the gases into the tubes of the rear bank.

At the rear of the bridge wall is a crossbox 14 which is connected with the frontsteam and water drum by additional water vtubes 15, the alternate tubes being bent at drum and they are spaced far enough apart to allowa man to pass between them. The tubes 15 are so located relatively to the front bank 5 as to permit of the placing of a superheater in the space between sai tubes and bank. This superheater comprises the cross-boxes 18 and 19 extending between the side walls and connected by inverted U- tubes 20. The boxes are located in the lower part of 'theV space between the tubes 15 and the bank 5, and the superheater tubes extend approximately to the 'upper .end of the baiie 16. Placed over the boxes 18 and 19 are tiles 21 to prevent short circuiting of the gases around the bpxes to the lower end of the front 'bank of tubes. The steam from the middle drum 2 flows through pipe 22 to box 18 and is delivered to the steam main from box 19. `'llhe superheater is so set that short cores may be used in the tubes or, if desired, jointed cores may be employed to extend the full length of the straight lportion of the tubes. The furnace gases are directed substantially as indicated by the-arrows, those passing between the lower ends of the tubes 15, below baille 16, passing upward over the superheater and mingling with those which. cross the upper ends of the tubes 15 and the front bank of tubes. By altering the height of the baffle 16, different degrees of superheat may be secured. A seal 23 isf shown between the cross-box l1 and the bridge-wall to prevent the furnace gases short circuiting beneath the cross-box. y'llhe bridge wall 9 should be built` high enough to prevent the radiant heat from the furnace fluxing or caking the dust which collects above this seal. A dusting door 24 is provided in the side of the setting opposite the seal 23 for removing any dust which may collect above said seal.

Instead of the Hat tiling used for the battle 16, as shown in Figs. 1 and 2, 1 may employ tiles 25 substantially semi-circular incross-section, as shown in Figs. 3 and 1.

' rlhis form of tiling may be installed by rotating them around the tubes into the positions indicated in the drawings.

1n Fig. 5 l have shown a boiler having a single row of tubes 26 in front of the front bank of tubes and not staggered rows as in Fig. 1. To support the balile 16 upon the single row of tubes 26, small steel or iron lugs 27 are secured to the tubes by any suitable means, preferably by welding, as indicated in Fig. 6. rll`he lower tiles constituting the baille are notched so as to cover the supporting lugs and to protect them from the direct heat of the gases. The baffling for the banks of tubes is substantially the same as in Fig. 1, but the rear wall of the setting is so placed as to provide a gas passage back of the rear bank of tubes to permit the gases to escape at the outlet which is here located at the top of the setting, instead o-f at the lower part thereof as in F ig. l.

lin the design o-f Fig. 5 1 have also introduced a superheater into the secondary combustion chamber at the rear of the front bankv of tubes, said superheater comprising boxes 28 and 29` connected by inverted U- tbes 30. The steam from the boiler flows through the pipe 22 to box 28 and is cont ducted from the outlet box 29, by a pipe 31, to box 18 ofthe superheater in fro-'nt of the front bank of tubes. lin this design the steam to be superheated is first subjected to the heat of the gases flowing over the upper part of the front bank of tubes and then to those which enter below the bae 16 and taedii combustion around the superheater, when one is used, increases the superheat.

What 1 claim and desire to secure by Letters Patent of the United States is:

1. A water tube boiler having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes connecting the mud drum with the irst steam and water drum and in front of the iirst bank of tubes and separated therefrom, a superheater in the space between said additional water tubes and the rst bank of tubes, and bathing arranged to give an uplow of gases over the superheater.

2. A water tube boiler having a plurality of transverse steamand water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes connecting the mud drum with the first steam and water drum and in front of the first bank of tubes and sepaspace between said additional water tubes and the first bank of tubes, said superheater comprising cross boxes in the lower part of said space and connected by tubes extending upward therefrom, and baliiing arranged to give an upflow of gases over the superheater.

3. A water tube boiler having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with/the mud drum, addi- .rated therefrom, and a superheater in the tional water tubes connecting the mud drum with the first steam and water drum and in front of the irst bank of tubes and separated therefrom, a superheater inthe space between said additional water tubes and the first bank of tubes, and a baffle supported by said additional tubes and arranged to permit furnacegases to enter the lower part of said space toy flow upward over the superheater tubes.

4. A water tube boiler having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes connecting the mud drum with the first steam and water drumand in front of the irst bank of tubes vand separated therefrom, a superheater in the space Iof transverse steam and water drums, a mud drum, banks of tubes connecting `the steam and water drums with the mud drum additional water tubes connecting the mud drum with the first steam and water drum and in front of the first bank of tubes and sepaf rated therefrom, a superheater in the space front bank.

between said additional water tubes and the first bank of tubes, baling arranged to give an upfiow of gases over the superheater, and means to prevent short-circuiting of the gases around the lower ends of said additional tubes. l i

6. A water tube boiler having a plurality of transverse steam and water drums, a4

mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes. connecting the mud drum with the first steam and water drum and in front of the first bank of tubes and separated therefrom, a superheater in the space between said additional water tubes and the first bank of tubes, and baies to direct gases upward over the superheater tubes and thence ydownward over the first bank of tubes.

7. A water tube boiler-having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes connecting the mud drum with.v the first steam and water drum and in front of the rst bank of tubes and separated therefrom, a superheater in the space vbetween said additional water tubes and the first bank of tubes, a baffle supported by said additional tubes and so placed as to permit the gases to enter the lower part of said space and a baile at the front of the first Y bank of tubes arranged to allow part of the rising gases to 8. A water tube boiler having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, a

transverse water box connected tothe mud drum, water tubes connecting said box with the first steam and water drum, a superheater in the space between said water tubes and the first bank of tubes, and baiiiing arranged on said water tubes to give an upflow of gases over the superheater.-

9. A water tube boiler Having transverse steam and water drums connectedby banksv of tubesv to a transverse mud drum, a furnace bridge wall, a cross-.box at the rear of pass over into the top of the v said wall, water tubes connecting said crossbox with the first steam and water drum and nipples connecting said cross-box with the mud drum, said nipples being spaced far enough apart to allow a man to pass between them.

10. A water tube boiler having transverse steam and water drums connected by banks of tubes to a transverse mud drum, a furnace` bridge' wall, a cross-box 'at the rear of said wall, water tubes connecting said crossbox with the rst steam and water drum,

nipples connecting said cross-'box with the ,mud drum, said nipples being spaced far and the first bank of tubes, a superheater' at y the rear 4of the first bank of tubes and a steam connection between said superbeaters.

12. A water tube boiler having a plurality of transverse steam and water drums, a mud drum, banks of tubes connecting the steam and water drums with the mud drum, additional water tubes connecting the mud drum with the firststeam and water drum and in front of the rst Abank of tubes and separated therefrom a superheater in the space between said additional water tubes and the first bank of tubes, an inverted U-tube superp 'heater at the rear of the rst bank of tubes, and a steam connection between the outlet of said last-named superheater and the inlet of the first-named superheater.

13.` A water tube boiler having-a plurality of transverse steam and water drums, a mud drum, banks of tubes connectin the steam and water drums with the mu drum,tl1e rst bank having rows of tubes in front of a plane passed through the axes of the mud drum and the first steam and water drum, additional water tubes connecting the mud drum with the first steam and water drum and in front of the first bank of tubes and separated therefrom, and a balie supported upon said additional tubes to direct a por-I tion of the rising gases into the lower part of the space between the additional tubes and the first bank.

14. A water tube boiler having a plurality @i Mamet tional water tubes connecting the mudt drum l"tween said additional tubes andl the rst JL@ lwith the first steam and water drum and in bank of tubes. Ifront of the first bank of tubes and sepa- `v 1in testimony whereof I have hereunto rated therefrom, and a bame forming the signed my name in the presence of two subg5 rear of the combustion chamber and so sorbing witnesses.`

placed as to direct a portion. of the furnace DAVID S. JACBS. gases upward to the top of the rst banket Witnesses: Y tubes and permit another portion of the CHARLES S, JoNns e gases to enter the lower part of the space be- A l EDITH @Amm 

